[asterisk-users] Codec negotiation

[Philipp von Klitzing]

Hi!

> Because the codec is already chosen before the call is made, and you
> told it that g722 is permitted.
> 
> There are all sorts of discussions in play about codec negotiation,
> but at this point in time, if you want different behaviour you'll need to
> go and code it yourself

Look at the list archive - there is a codec negotiation patch around:

http://lists.digium.com/pipermail/asterisk-users/2010-
February/244835.html

The OP might also want to consider to use different lines to the same 
PBX, one for normal narrowband, and another one for g722.

Philipp